Mechanism for truing and dressing grinding wheels



R. P. PLACE Dec. 1, 1931'.

MECHANISM FOR TRUING AND DRESSING GRINDING WHEELS Filed April 3. 1929 fF/d/YJ PP/dce Wrong Patented Dec. 1, 1931' UNITED STATES *PA'PENr ROLAND 1?. PLACE, on MID-LAND,MIGHIGAN,'ASS1GNOR 'ro' ROL ND 2. PL CE do, or MIDLAND, MICHIGAN, A'oon-roRA'rIoN or MIcmG N MECHANISM non TR'UING AND DRESSINT'G GRINDING Application filed April 3,

This invention is directed to means for truing and dressing grinding wheels, such as emery wheels and wheels of a similar abrasive nature, and which are used for grinding or polishing the surfaces of metal parts in precision work.

The prime object of the invention is toprovide a rotary abrading wheel, so positioned that its axis of rotation is presented 0 towards the grinding wheel with which it coact-s, so as to be rotated by the grinding surface of the grinding wheel.

Another object is to combine an abrading wheel and tail center to the end that a minimum of movement and time is required to move the face of the grinding wheel into position for engagement with the abrading Wheel, thereby conserving time and energy.

The above and other objects will appear as the specification progresses, references being had to the accompanying drawings in which I have shown the preferred embodiment of my invention, and in which like reference numerals indicate like parts throughout the several views thereof.

In the drawings:

Fig. 1 is a top plan view of a grinding machine havin a reciprocating carriage for the grinding wdieel, and showing my combination tail center and abrading wheel in place thereon. v

Fig. 2 is an end view thereof, parts being broken away for a better illustration.

Fig. 3 is an enlarged plan view of the tail stock showing my combination center and abrading wheel mounted therein.

Fig. 4 is an end view thereof.

The machine as shown is of the conventional design and forms no part of the present invention which is directed to the combination tail center and abrading wheel, but in order that the nature of the invention may be clearly understood, a brief description of the machine will be given. p

The machine comprises a base 5 on which a grinding wheel carriage 6 is mounted, said carriage being mounted in guideways 7 for travel in the usual manner. A slide 8 is mounted on guides 9 provided on the said 1929. Serial Ito-352,143.

carriage, and bearings 10 are castlintegral vwith the slide, a shaft 11 being journaled in said hearings, and a grinding wheel 12 is secured on the one end thereof, a drive pulley 13 being also mounted on said shaft and 113 driven from any suitable source of power, by means of a belt or the like.

Spaced apart bearings 14 are provided on the carriage in position as shown and an adjusting screw 15 is journaled therein, a nut 16 ,5 being formed integral with the slide and engages said screw. A hand wheel 17 is secured on the end of the screw, so that it may be rotated to adjust the distance between the face of the grinding wheel and the work 18, and a clamp bolt 19 secures the parts in adjusted position.

A head stock 20 is mounted on one end of the machine and is provided with a head center 21 in athe usual manner, a tail stock jo 22 being mounted on the opposite end and is also of conventional design, excepting that the tail center 23 forms the shaft of an abrading wheel 24 which is rotatably mounted thereon, well known means being provided jti for causing approach and recession between the head stock and tail stock to permit the insertion and holding of the work and as clearly shown in dotted lines in Fig. 3 of the drawings, the lever 25 being also shown in two so positions. A support 27 is mounted in the side of the tail stock, and a guard 28 is fixed on the end thereof to protect the eyes of the operator. The tail stock is clamped to the machine by the bolt 29, and the/ 5 overhang-is supported by means of avertically disposed threaded member 30 which has threaded engagement with an opening 31 provided in the guard support 27, the lower end of the member 30 being flanged to forln eo a base 32 which rests on the machine.

Grinding of the nature, in which. this ma chine is used, is generally on a production basis, consequently, it is the aim to eliminate lost motion and to so position the abrading W wheel that the grinding wheel can be shifted into engagement therewith with a minimum of movement and time. With the abrading wheel positioned as shown, it is merely necessary to move the carriage a very short distance beyond the one end of the work and the face of the grinding wheel can be readily dressed. This requires a minimum of time and labor, andincreases the efficiency and 5 capacity of the machine proportionately.

From the foregoing description it will be obvious that I-have perfected a, very simple, eflicient, andeconomical combined center and abrading wheel for dressing grinding wheels 10 'andthe like. i

What I claim 'is':

In a mechanism for truing and dressing grinding wheels, the combination with a tail center, of an abradingwheelrevolubly and g 15 concentrically mounted thereon, and means for reciprocating said grinding -wheel to 'brin it into engagement with and rotate said abra i iing' wheel.

' T i ROLAND P. PLACE. 

